2种金属表面处理剂对铸造纯钛试件与树脂黏固剂粘接强度的影响

目的研究2种金属表面处理剂对铸造纯钛试件与树脂黏固剂粘接强度的影响。方法用牙科铸钛的方法制作直径分别为4 mm和5 mm的钛棒，并切割成长度为3 mm的小钛片。将2种规格的钛片配对，粘接面用碳化硅砂纸在流水下打磨抛光，使之呈均匀一致的平面，50 μm Al2O3喷砂。试件随机分成3组进行表面处理：第1组不使用金属表面处理剂，第2组使用Alloy Primer进行表面处理，第3组使用V-Primer进行表面处理。然后每组再分为3个小组，分别使用Super-Bond C&B、Panavia F、Rely X Unicem 3种黏固剂粘接。黏固剂固化1 h后，经37 ℃恒温水浴24 h以及5 000次冷热循环后，测试粘接强度，并观察铸造纯钛的表面形态和粘接面的破坏形式。结果AlloyPrimer、Super-Bond C&B的配伍组合与铸造纯钛获得的粘接强度在冷热循环前、后分别为（31.23±4.86）、（34.08±3.36）MPa，高于其他表面处理剂与树脂黏固剂配伍组合获得的粘接强度（P<0.05）。结论金属表面处理剂和树脂黏固剂的组合不同会导致粘接强度不同，经Alloy Primer处理的铸造纯钛试件与Super-Bond C&B的粘接强度最高。

The effects of two primers on the bond strengths between casting pure titanium specimen and resin cements

Objective To study the effects of two primers on the bond strengths between casting pure titanium and resin cements. Methods Two sizes of specimen were fabricated by casting, which diameter were 4 mm and 5 mm respectively, and then were cut into 3 mm thick titanium discs. The titanium surfaces were polished with silicon carbide sand papers under running water and then treated by sandblasting. The two size of titanium disc were ultrasonic cleaned and treated with Alloy Primer, V-Primer or without primer, and then bonded in pairs with the resin -based cements Super -Bond C&;B, Panavia F and Rely X Unicem. The specimens were then stored in distilled water（37 ℃） for 24 h. Bond strengths were determined before and after 5 000 thermocycling. The titanium surface morphous and failure mode of the teat specimen were observed. Results The shear bond strengths of titanium treated by Alloy Primer to Super-Bond C&;B were （31.23±4.86）, （34.08±3.36）MPa before and after 5 000 thermocycling, which higher than that of other combinations of primers and resin cements. Conclusion Bond strengths were influenced by primers, resin cements, and their combinations. The highest bond strengths were the combinations of Alloy Primer and Super-Bond C&;B.